Shore attachment



Patented Jan. 26, 19352 UNETED STAkl'Eti CHARLES M. MARKI-IAM, OFTOLEDO, GHIO SHORE ATTACHMENT Application filed catcher 14, 1929.

This invention relates to a shore attachment particularly adapted to beused in corn crete construction work for securing forms for concretejoists or girders at the upper ends of the shores.

The general object of the invention is to provide a. device which may beeasily and (prickly applied to the upper end of a shore beam andadjusted to hold the walls of the concrete form firmly in positionwithout the use of braces or other holding means except ti'iose embodiedin the device itself. The device may be used over and overagain onsuccessive jobs with a great savmg 1n the cost of labor and material.

The invention will be more particularly described in connection with theaccompanying drawings, in which ll igure 1 is a side elevation of theimproved attachment, showing in section the form held thereby.

Figure 2 is a section taken on the line 22 of l igiiire 1.

Figure 3 is a section taken on the line 3-3 (it :higure 1.

Figure 4L is a section taken on the line l st of Figure 1.

As illustrated in the drawings, my invention is nmunted on the upper endof a post or shore beam 5. The head which is thus sup ported comprises asteel beam 6, which is t-shaped in cross section, with the middleportion of the flange 7 cut away to receive the end of the shore beam 5.

lhc attachment also includes two opposed channel. bars 8 emb 'acingopposite faces of the shore beam at its upper end. The ends of thechannel bars 8 are connected on each side by strips 9, and the lowerends of the channel bars 8 are connected by diagonal braces in the formof channel bars to the end portions of flanges 7. The parts 6, Y, 8, 9and 10 are all welded or otherwise permanently secured together to forma strong and rigidly constructed head for supporting the concrete formwhich is shown as having a bottom 11 and side walls 12.

The form is adapted to be held between two clamping members which aremounted on the T-beam 6. Each of these clamping members Serial No.398,484.

is in the shape of a right triangle having a vertical side 13 adapted toabut the face of the side wall 12. An integral brace 14 constitutes thehypotenuse of the triangle and the base is formed with clips 15 and 16slidably engaging the side flanges of the beam 6 and rigidly connectedby a tie rod or bar 17. For adjusting these clamping members to clampthe form tightly, the T-beam 6 is termed with series of slots 18selectively engagcable by wedges 19. The slots 18 are arranged instaggered relation so that for any pori on of the side wall 12 the wedgemay always be driven into one of these slots to force the clampingmember against the face of the term. Each wedge 19 may be convenientlycarried on the end of a chain 20 which is connected with the diagonalbrace 14.

From the foregoing description it ivill be seen that after the shorebeam is placed in position with my im proved attachment on its upperend. and the concrete form resting thereon, the (flitil'lplllg membersmay be quickly secured in clamping position by driving the wedges 19into the proper slots. After the concrete has the shore may be just asreadily removed by knocking out the wedges 19 and may be immediatelyused on another job. It will be appreciated that the same shores andclamps may be used over and over again and that the expense for laborand material is very greatly reduced thereby.

l ihilc l have shown and described specifically the preferred form ofthe invention, it i will be understood that the same is capable ofvarious modifications and other uses which {all within the scope of theappended claim.

lVhat I claim is:

A shore head col'nprisinpa casing adapted to lit over the upper end of ashore beam, a T-beam cmistitutinp; a cross head adapted to resthorizontally upon the end of the shore beam, opposed clampin members inthe form of right triangles having basestm'med with v of longitudinallydisposed slots in its side i flanges arranged in staggered relation onopposite sides of its vertical Web and adjacent thereto, and wedgesselectively insert-able in said slots to force said clamping membersprogressively toward each other to clamp a form between them.

In testimony whereof I have hereunto signed my name to thisspecification.

CHARLES M. MARKHAM.

